Have You Seen My 18 Wheeler?

This is Book #11 in the series of 13, each with 19 different firms. Did you ever wonder how many 18 wheelers we share interstate highways with? I decided to search for 18 wheelers and you can select from any of these books to search for your favorite. There are 19 firms to search for and spot. This is an exciting travel game to provide many miles and hours of entertainment and competition to see who can spot the most trucks. It can be used as a break from the License Plate Game or the Alphabet Game. After all, how long can you continue to search for that license plate from Rhode Island?